-91.5% is the change from 835 to 71
Calculation steps:
[( 71 - 835 ) ÷ 835] x 100 = -91.5%
Formula
Percentage change = [(71 - 835) / 835] x 100
Subtract the new number by the original number
71 - 835 = -764
-764 ÷ 835 = -0.9149700598802395
-0.9149700598802395 x 100 = -91.5%